Updates in QA task IO and checker

In this merge request, the subdirectory model of the QA-task output was changed from TFolder to TDirectoryFile. There are two reasons of the modification. Firstly, the TFolder class is a legacy code and is not recommended to be used. Secondly, the reading many objects from a TFolder rapidly causes memory usage increase (even if one simply calls gFile->FindObjectAny("a_folder")).

added BugFix QA Tracking labels

requested review from @se.gorbunov

assigned to @se.gorbunov

Dear @se.gorbunov, @f.uhlig, @p.-a.loizeau, @v.akishina,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

approved this merge request

added 3 commits

• c8c95f47 - 1 commit from branch computing:master
• f89fa721 - QA checker: memory leak fixes
• f1ec56d5 - QA: replacement of TFolder with TDirectoryFile subdirectory representation in the QA output

Compare with previous version

enabled an automatic merge when the pipeline for f1ec56d5 succeeds

merged